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First Measurement of the Real Part of a $p p$ Double Spin Flip Amplitude

Gazzaly, M.M. ; Pauletta, G. ; Tanaka, N. ; et al.

Phys.Rev.Lett. 58 (1987) 1084, 1987.

Inspire Record 247888 DOI 10.17182/hepdata.20181

The asymmetry ANN for pp elastic scattering has been measured at 800 and 650 MeV in the region of Coulomb-nuclear interference. The data have been analyzed to extract the real part of a spin-spin scattering amplitude. Results are compared with the predictions of forward dispersion relations. They disagree significantly at 650 MeV.

2 data tables match query

Table 1

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A(ll) at Small Momentum Transfers for the First Complete Determination of the Forward $p p$ Scattering Amplitude

Pauletta, G. ; Gazzaly, M. ; Tanaka, N. ; et al.

Phys.Lett.B 211 (1988) 19-23, 1988.

Inspire Record 252973 DOI 10.17182/hepdata.29911

The asymmetry A LL for pp elastic scattering has been measured at 650 and 800 MeV in the region of Coulomb-nuclear interference. The real part of the double-spin-flip amplitude extracted from these data completes our determination of the forward pp scattering amplitudes at these energies. Comparison with the predictions of forward dispersion relations reveals a discrepancy in the spin-dependent channels at 650 MeV.

2 data tables match query

Table 1

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Table 2

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Measurement of the Spin Parameters a and A(nn) in $p p$ Elastic Scattering in the 1-{GeV}/$c$ to 3-{GeV}/$c$ Region

Bell, D.A. ; Buchanan, J.A. ; Calkin, M.M. ; et al.

Phys.Lett.B 94 (1980) 310-314, 1980.

Inspire Record 153380 DOI 10.17182/hepdata.27194

We have measured the asymmetry parameter A and the spin correlation parameter A nn in pp elastic scattering, using the Argonne ZGS polarized proton beam and a polarized proton target. Angular distributions of A and A nn for | t | ≳ 0.2 (GeV/ c ) 2 were obtained at eight momenta between 1.10 and 2 if 2.75 GeV/ c . We find significant structure in both the energy and t -dependence of A nn at these energies. At p lab ≈ 1.34 GeV/ c A nn reaches a very large value of about 0.8–0.9 near θ cm = 90°.

8 data tables match query

Table 1

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